Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Examining the ‘wetness’ of the wet adhesive toe pads of tree frogs : Functional interpretation of morphological and chemical properties
Langowski, J.K.A. ; Leeuwen, J.L. van - \ 2019
Stripping chronopotentiometry at scanned deposition potential (SSCP) : An effective methodology for dynamic speciation analysis of nanoparticulate metal complexes
Town, Raewyn M. ; Leeuwen, Herman P. van - \ 2019
Journal of Electroanalytical Chemistry 853 (2019). - ISSN 1572-6657
Chemical heterogeneity - Dynamic metal speciation - Humic substances - Lability - Nanoparticulate complexants

The features of stripping chronopotentiometry at scanned deposition potential (SSCP) are reviewed and placed in context with voltammetric and other dynamic speciation techniques. The advantages of SSCP for speciation analysis of nanoparticulate metal complexes are highlighted. Analogous to other electrochemical techniques, the SSCP wave is rich in information: the measurements from the foot to the plateau of the wave access the relevant parts of the stability distribution and the rate constant distributions. The complete depletion regime of SSCP offers particular advantages due to its ability to unambiguously distinguish between various factors that can confound interpretation of data from other electroanalytical methods, including electrochemical irreversibility, kinetically controlled currents, reduced diffusion coefficient of the metal complex species as compared to the free metal ion, and chemical heterogeneity in the intrinsic binding affinity.

Earth System Governance : Science and Implementation Plan of the Earth System Governance Project 2018
Burch, Sarah ; Gupta, A. ; Yumie Aoki Inoue, Christina ; Kalfagianni, Agni ; Persson, Asa ; Heijden, Jeroen van der; Vervoort, Joost ; Adler, Carolina ; Bloomfield, Michael John ; Djalante, Riyanti ; Dryzek, John S. ; Galaz, Victor ; Gordon, Christopher ; Harmon, Renee ; Jinnah, Sikina ; Kim, Rakhyun E. ; Olsson, Lennart ; Leeuwen, J. van; Ramasar, Vasna ; Wapner, Paul ; Zondervan, Ruben - \ 2019
Utrecht : Earth System Governance - 128 p.
On-Flow Immobilization of Polystyrene Microspheres on β-Cyclodextrin-Patterned Silica Surfaces through Supramolecular Host-Guest Interactions
Willems, Stan B.J. ; Bunschoten, Anton ; Wagterveld, R.M. ; Leeuwen, Fijs W.B. Van; Velders, Aldrik H. - \ 2019
ACS Applied Materials and Interfaces 11 (2019)39. - ISSN 1944-8244 - p. 36221 - 36231.
flow cell - microcontact printing - microparticles - supramolecular chemistry - water purification

Species-specific isolation of microsized entities such as microplastics and resistant bacteria from waste streams is becoming a growing environmental challenge. By studying the on-flow immobilization of micron-sized polystyrene particles onto functionalized silica surfaces, we ascertain if supramolecular host-guest chemistry in aqueous solutions can provide an alternative technology for water purification. Polystyrene particles were modified with different degrees of adamantane (guest) molecules, and silica surfaces were patterned with β-cyclodextrin (β-CD, host) through microcontact printing (μCP). The latter was exposed to solutions of these particles flowing at different speeds, allowing us to study the effect of flow rate and multivalency on particle binding to the surface. The obtained binding profile was correlated with Comsol simulations. We also observed that particle binding is directly aligned with particle's ability to form host-guest interactions with the β-CD-patterned surface, as particle binding to the functionalized glass surface increased with higher adamantane load on the polystyrene particle surface. Because of the noncovalent character of these interactions, immobilization is reversible and modified β-CD surfaces can be recycled, which provides a positive outlook for their incorporation in water purification systems.

Van Proeftuin Veenweiden naar Klimaatslim Boeren op Veen : rapportage
Joosten, Leo ; Migchels, Gerard ; Leeuwen, Marieke van - \ 2019
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapportage 1202) - 4
Mogelijkheden tot vermarkten van reducties in ammoniakemissie in het westelijk veenweidegebied: rapportage
Joosten, Leo ; Migchels, Gerard ; Leeuwen, Marieke van - \ 2019
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapportage 1203) - 13
Naar een ketengerichte aanpak om ammoniakemissie te reduceren : Ontwerp en toepassing
Migchels, Gerard ; Joosten, Leo ; Leeuwen, Marieke van - \ 2019
Wageningen : Wageningen Livestock Research (Rapport / Wageningen Livestock Research 1197) - 31
Naar een integraal gebiedsgerichte aanpak om ammoniakemissie te reduceren : Ontwerp en pilot
Leeuwen, Marieke van; Migchels, Gerard ; Joosten, Leo - \ 2019
Wageningen : Wageningen Livestock Research (Rapport / Wageningen Livestock Research 1198) - 28
Borgen van maatregelen om ammoniakemissie te reduceren
Migchels, Gerard ; Joosten, Leo ; Leeuwen, Marieke van; Ferwerda, Reina ; Wim Houwers, Wim - \ 2019
Wageningen : Wageningen Livestock Research (Rapport / Wageningen Livestock Research 1196) - 42
Eerste verkenning arrangementen om ammoniakemissie in het westelijke veenweidegebied te reduceren
Migchels, Gerard ; Leeuwen, Marieke van; Joosten, Leo - \ 2019
Wageningen : Wageningen Livestock Research (Rapport / Wageningen Livestock Research 1195) - 17
The social license to operate of oil and gas development in Greenland
Smits, Coco C.A. - \ 2019
Wageningen University. Promotor(en): J.P.M. van Tatenhove, co-promotor(en): J. van Leeuwen. - Wageningen : Wageningen University - ISBN 9789463950459 - 221
Swimming performance and morphology of pregnant fish
Quicazán Rubio, Elsa Magnolia - \ 2019
Wageningen University. Promotor(en): J.L. van Leeuwen, co-promotor(en): B.J.A. Pollux. - Wageningen : Wageningen University - ISBN 9789463950336 - 163
Exploring the functional role of the digital mucus glands and their secretions in tree frog attachment
Langowski, J.K.A. ; Singla, Saranshu ; Nyarko, Alex ; Schipper, H. ; Berg, Frank van den; Kaur, Sukhmanjot ; Astley, Henry C. ; Gussekloo, S.W.S. ; Dhinojwala, Ali ; Leeuwen, J.L. van - \ 2019
- 1 p.
Exploring the effects of free surface energy variations on tree frog attachment
Nieuwboer, Lisa ; Langowski, J.K.A. ; Leeuwen, J.L. van - \ 2019
- 1 p.
Monitoring integraal duurzame stallen : peildatum 1 januari 2019
Peet, G.F.V. van der; Meer, R.W. van der; Docters van Leeuwen, H. ; Wageningen-Lucardie, S.R.M. van - \ 2019
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1183) - 21
Since 2008 commissioned by the Ministry of agriculture, nature and food quality (LNV) WUR conducts the monitor integral sustainable stables. The monitor shows that on 1 January 2019 in the Netherlands 16.5% of all cattle, pig and poultry houses are integral sustainable.
National Reference Laboratories WFSR : annual report 2018
Noordam, M.Y. ; Silletti, E. ; Alewijn, A. ; Scholtens, I.M.J. ; Jong, J. de; Raamsdonk, L. aan; Lasaroms, J.J.P. ; Gerssen, A. ; Lee, M.K. van der; Mol, J.G.J. ; Leeuwen, S.P.J. van - \ 2019
Wageningen : Wageningen University & Research (WFSR-report 2018.011) - 51
Malaria mosquitoes use leg push-off forces to control body pitch during take-off
Veen, Wouter G. van; Leeuwen, Johan L. van; Muijres, Florian T. - \ 2019
Journal of Experimental Zoology Part A: Ecological and Integrative Physiology (2019). - ISSN 2471-5638
aerodynamics - Anopheles coluzzii - computational fluid dynamics

Escaping from a blood host with freshly acquired nutrition for her eggs is one of the most critical actions in the life of a female malaria mosquito. During this take-off, she has to carry a large payload, up to three times her body weight, while avoiding tactile detection by the host. What separates the malaria mosquito from most other insects is that the mosquito pushes off gently with its legs while producing aerodynamic forces with its wings. Apart from generating the required forces, the malaria mosquito has to produce the correct torques to pitch-up during take-off. Furthermore, the fed mosquito has to alter the direction of its aerodynamic force vector to compensate for the higher body pitch angle due to its heavier abdomen. Whether the mosquito generates these torques and redirection of the forces with its wings or legs remains unknown. By combining rigid-body inverse dynamics analyses with computational fluid dynamics simulations, we show that mosquitoes use leg push-off to control pitch torques and that the adaption of the aerodynamic force direction is synchronized with modulations in force magnitude. These results suggest that during the push-off phase of a take-off, mosquitoes use their flight apparatus primarily as a motor system and they use leg push-off forces for control.

Modeling of Soil Functions for Assessing Soil Quality: Soil Biodiversity and Habitat Provisioning
Leeuwen, J.P. van; Creamer, Rachel ; Cluzeau, Daniel ; Debeljak, Marko ; Gatti, Fabio ; Henriksen, Christian Bugge ; Kuzmanovski, Vladimir ; Menta, Cristina ; Pérès, Guénola ; Picaud, Calypso ; Saby, N.P.A. ; Trajanov, Aneta ; Trinsoutrot-Gattin, Isabelle ; Visioli, Giovanna ; Rutgers, M. - \ 2019
Frontiers in Environmental Science 7 (2019). - ISSN 2296-665X - 13 p.
Soil biodiversity and habitat provisioning is one of the soil functions that agricultural land provides to society. This paper describes assessment of the soil biodiversity function (SB function) as a proof of concept to be used in a decision support tool for agricultural land management. The SB function is defined as “the multitude of soil organisms and processes, interacting in an ecosystem, providing society with a rich biodiversity source and contributing to a habitat for aboveground organisms.” So far, no single measure provides the full overview of the soil biodiversity and how a soil supports a habitat for a biodiverse ecosystem. We have assembled a set of attributes for a proxy-indicator system, based on four “integrated attributes”: (1) soil nutrient status, (2) soil biological status, (3) soil structure, and (4) soil hydrological status. These attributes provide information to be used in a model for assessing the capacity of a soil to supply the SB function. A multi-criteria decision model was developed which comprises of 34 attributes providing information to quantify the four integrated attributes and subsequently assess the SB function for grassland and for cropland separately. The model predictions (in terms of low—moderate—high soil biodiversity status) were compared with expert judgements for a collection of 137 grassland soils in the Netherlands and 52 French soils, 29 grasslands, and 23 croplands. For both datasets, the results show that the proposed model predictions were statistically significantly correlated with the expert judgements. A sensitivity analysis indicated that the soil nutrient status, defined by attributes such as pH and organic carbon content, was the most important integrated attribute in the assessment of the SB function. Further progress in the assessment of the SB function is needed. This can be achieved by better information regarding land use and farm management. In this way we may make a valuable step in our attempts to optimize the multiple soil functions in agricultural landscapes, and hence the multifaceted role of soils to deliver a bundle of ecosystem services for farmers and citizens, and support land management and policy toward a more sustainable society.
Rigorous Physicochemical Framework for Metal Ion Binding by Aqueous Nanoparticulate Humic Substances: Implications for Speciation Modeling by the NICA-Donnan and WHAM Codes
Town, Raewyn M. ; Leeuwen, Herman P. Van; Duval, Jérôme F.L. - \ 2019
Environmental Science and Technology 53 (2019)15. - ISSN 0013-936X - p. 8516 - 8532.

Latest knowledge on the reactivity of charged nanoparticulate complexants toward aqueous metal ions is discussed in mechanistic detail. We present a rigorous generic description of electrostatic and chemical contributions to metal ion binding by nanoparticulate complexants, and their dependence on particle size, particle type (i.e., reactive sites distributed within the particle body or confined to the surface), ionic strength of the aqueous medium, and the nature of the metal ion. For the example case of soft environmental particles such as fulvic and humic acids, practical strategies are delineated for determining intraparticulate metal ion speciation, and for evaluating intrinsic chemical binding affinities and heterogeneity. The results are compared with those obtained by popular codes for equilibrium speciation modeling (namely NICA-Donnan and WHAM). Physicochemical analysis of the discrepancies generated by these codes reveals the a priori hypotheses adopted therein and the inappropriateness of some of their key parameters. The significance of the characteristic time scales governing the formation and dissociation rates of metal-nanoparticle complexes in defining the relaxation properties and the complete equilibration of the metal-nanoparticulate complex dispersion is described. The dynamic features of nanoparticulate complexes are also discussed in the context of predictions of the labilities and bioavailabilities of the metal species.

Handboek Groenbemesters 2019
Leeuwen-Haagsma, W.K. van; Hoek, H. ; Molendijk, L.P.G. ; Mommer, L. ; Ulen, Jacqueline ; Kroonen-Backbier, B.M.A. ; Groot, G.A. de - \ 2019
Wageningen : Wageningen University & Research
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